Tim Armstrong has uploaded a new patch set (#5). (
http://gerrit.cloudera.org:8080/11205 )
Change subject: IMPALA-7356 (part 1 of ?): admission control stress
......................................................................
IMPALA-7356 (part 1 of ?): admission control stress
Add initial support for running the stress test in a mode where
it tests that memory-based admission control prevents out-of-memory.
A new mode is added that can be enabled by passing
--test-admission-control=true to concurrent_select.py
In this patch, the stress test's builtin "admission control" is still
always enabled, because it is useful in achieving a desired level of
memory overcommit. However, mem_limit is not set by the test - it
should be set by memory-based admission control - and the pass
conditions of the test are tightened up so that OOM is not allowed.
Admission control rejection/timeout are separated out from other errors
because they are expected when a cluster is under stress.
Future patches will likely disable or modify the behaviour of the stress
test's admission control when --test-admission-control=true.
Two columns are added to the output. Here's a sample when running in the
old mode against a minicluster with admission control enabled:
Done | Running | Mem Lmt Ex | AC Reject | AC Timeout | Time Out | Cancel |
Err | Incorrect | Next Qry Mem Lmt | Tot Qry Mem Lmt | Tracked Mem | RSS Mem
0 | 0 | 0 | 0 | 0 | 0 | 0 |
0 | 0 | 0 | 0 | |
1 | 10 | 0 | 1 | 0 | 0 | 0 |
0 | 0 | 137 | 3954 | 147 | 452
11 | 20 | 0 | 10 | 0 | 0 | 0 |
0 | 0 | 1521 | 12942 | 203 | 446
15 | 30 | 0 | 14 | 0 | 0 | 0 |
0 | 0 | 130 | 18139 | 4382 | 1911
46 | 35 | 19 | 26 | 0 | 0 | 0 |
0 | 0 | 328 | 18101 | 3266 | 2916
98 | 36 | 47 | 50 | 0 | 0 | 0 |
0 | 0 | 270 | 18177 | 3164 | 3087
Also fixes some minor things:
* don't fail at startup if result hash and profile directories already
exist.
* remove old workarounds for incorrect error messages
Testing:
Ran local stress tests with --test-admission-control set to true and false.
Change-Id: Id31a77f1fe6854a56ce54d1de333793e18087be4
---
M tests/stress/concurrent_select.py
1 file changed, 85 insertions(+), 48 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/05/11205/5
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Id31a77f1fe6854a56ce54d1de333793e18087be4
Gerrit-Change-Number: 11205
Gerrit-PatchSet: 5
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
